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ST25DV64K 数据表(PDF) 125 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 125 Page - STMicroelectronics |
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125 / 200 page  Figure 64. Write Password frame exchange between VCD and ST25DVxxx SOF Write Password request VCD EOF ST25DVxxx t1 SOF Write Password response EOF SOF EOF ST25DVxxx Wt Write sequence when error Write Password response 7.6.36 Present Password On receiving the Present Password command, the ST25DVxxx compares the requested password with the data contained in the request and reports if the operation has been successful in the response. Refer to Section 5.6 Data Protection for details on password Management. After a successful command, the security session associate to the password is open as described in Section 5.6 Data Protection. The Option_flag is not supported, and the Inventory_flag must be set to 0. Table 210. Present Password request format Request SOF Request_flags Present Password IC Mfg code UID (1) Password number Password CRC16 Request EOF - 8 bits B3h 02h 64 bits 8 bits 64 bits 16 bits - 1. This field is optional. Request parameter: • Request flags • UID (optional) • Password Number: – 00h = RF configuration password RF_PWD_0 – 01h = RF_PWD_1 – 02h = RF_PWD_2 – 03h = RF_PWD_3 – other = Error • Password Table 211. Present Password response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF - 8 bits 16 bits - Response parameter: • No parameter. The response is sent back after the write cycle. ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 125/200 |
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